It is easy to redirect all users of your WordPress site to a custom URL address after they successfully login to your website.
How To Redirect Users To Custom URL ?
Install and activate the new WordPress plugin Login Customiser. After activation visit your admin area Dashboard -> Settings -> Login Customiser admin page and paste the URL in the given field.
Note: The URL must be relative to your WordPress site, or it will be ignored. This is a security feature built into WordPress.